A/C

A/C Parts For Peterbilt Trucks

A functioning air conditioning system isn't a luxury in a Peterbilt — it's essential for driver comfort and safety, especially during long summer hauls. From compressors and condensers to blower motors and expansion valves, we carry the A/C components you need to keep the cab cool and the air flowing. Our parts are compatible with popular Peterbilt models including the 389, 579, and 567.

Frequently asked questions about A/C parts

Why is my Peterbilt A/C blowing warm air?

The most common causes are low refrigerant levels due to a leak, a failing compressor, or a clogged expansion valve. A malfunctioning blower motor or a dirty condenser can also reduce cooling performance. Start by checking refrigerant pressure and inspecting hoses and fittings for leaks.

How often should I service the A/C system on my truck?

Most manufacturers recommend a full A/C system inspection at least once a year, ideally before the warm season starts. This should include checking refrigerant levels, inspecting the compressor belt, cleaning the condenser, and replacing the cabin air filter if applicable.

Can I recharge the A/C refrigerant myself?

While basic recharge kits exist, heavy-duty truck A/C systems operate at higher pressures and capacities than passenger vehicles. Improper charging can damage the compressor or reduce system efficiency. For best results, have the system professionally serviced with the correct refrigerant type and charge weight for your Peterbilt model.

Other parts you might need

Browse A/C components for Peterbilt trucks